Medium [CVE-2026-38347] Heap overflow vulnerability leads to Denial of Service
This medium-severity Red Hat Linux advisory covers CVE-2026-38347 affecting Red Hat Enterprise Linux AI (RHEL AI) 3, Red Hat OpenShift AI (RHOAI).
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Summary
A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input. A flaw was found in FFmpeg.
Successful exploitation could lead to the application becoming unresponsive or crashing. The ffmpeg package is not shipped in base Red Hat Enterprise Linux.
It is available through EPEL, Red Hat Enterprise Linux AI, and as a bundled dependency in Red Hat OpenShift AI container images. The vulnerable code resides in libswscale, which is compiled and shipped in all FFmpeg builds across these products.
This is a heap overflow rather than a simple denial of service, which could potentially have higher impact if the overflow is controllable by an attacker. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI).
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
Mitigation checklist
- No mitigation is currently available for this flaw.
Official advisory · high-confidence parse· fetched 10 days ago·verify at source
Discussion(0)
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